New York AGRICULTURAL EXPERIMENT STATION. 301 
NuMBER oF InpIvIDUALS OF EacH BREED USED FOR COMPARISON IN 
THIS REPORT. 
In the tables which contain the monthly averages of the different 
breeds, the number of individuals of each breed is indicated below : 








| | | 
MONTH OF | Numberof|Numberof| Number of | Number of | Number of | Number of 
LACTATION. | Ayrshires.| Devons. Guernseys. | Holderness. Holsteins. | Jerseys. 
; art wy way | 
een... 2 2 2 2 La 
A a a 3 2 2 2 1 2 
= HE BA ae 3 2 2 2 ds 2 
1 ea 3 2 2 2 1 2 
ye 3 2 2 2 1 3 
1 Sia 3 2 2 2 i) 3 
Pusat \) 2s) 4 1 2 2 1 3 
SE panaretlcnies| 4 1 Do | 2 J 3 
Oe gee | 4 1 9 2 1 3 
10) ae | 4 1 2 2 if 3 


_ ——# eee — i eet 

Owing to unavoidable difficulties connected with the organiza- 
tion of the investigation, it is probable that the results obtained 
from the second period of lactation will afford a more complete 
and satisfactory basis of comparison in all cases. 
Metuops EMPLOYED IN CALCULATING AVERAGES OF Montruiy YIELDs. 
The months of lactation are made to coincide with the calendar 
months, since the records are all kept and the changes of rations 
made by calendar months. It, therefore, happens in most cases 
that the first month of lactation is less than a full calendar month 
In calculating the monthly averages, for obtaining monthly yields 
of milk, cream, butter, etc., the first month, if incomplete, is 
calculated up to a full month. 
OUTLINE OF DATA TO BE PRESENTED. 
The data will be presented and considered under the following 
heads : 
1. Cost of food consumed and of butter produced. 
9. Fat lost and recovered in butter-making: (1) Fat in milk ; 
(2) Fat in skim-milk ; (3) Fat in cream; (4) Fat in butter- 
milk; (5) Fat in butter; (6) Yield of butter; (7) Butter- 
making efficiency of milk-fat’; (8) Summary of results. 
